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Tarp Bottom edge Measurement

So I've got in 7 yards of SilNylon and I'm wanting to leave enough on the ends to make a set of doors that I can move around the tarp to where ever they are needed. So I'm trying to decide on the bottom edge length of my tarp.

I've already decided on 11 foot ridge line and I'm set on a 8-9 foot span, but how much should I leave for the bottom edge? Is 5 feet enough? 6 feet too much? What does your's measure?

P.S. Making a Cat cut hex tarp between the OES Standard & Deluxe.

*Heaven best have trees, because I plan to lounge for eternity.

Good judgement is the result of experience and experience the result of bad judgement. - Mark Twain

Check out my diy cat, hex tarp. The way I cut the fabric saved me more than a yard over what it would have been if I had done the standard ridgeline seam. I also have pdf's of the plans in there for reference. I think I used 8 yards though but I had a ton of coverage on the sides. Also, and i haven't seen this done yet, you could always make one side shorter and the other longer giving great coverage for porch mode but sufficient coverage from the rain on the other side.

11foot ridgeline verses a 5-6foot bottom edge.it'll work but from myown limited experence tarp making. the SERIOUSLY short bottom edge does nothing to shave weight off the assembly. the reason being that the door size has to make up the difference for the less wieight of the tarp main body! the reason being that youre looking at two doors on each end...that's 4doors per tarp!!! even if you address only one end i think you'll find that youre adding weight, rather than shaveing it off.

11foot ridgeline verses a 5-6foot bottom edge.it'll work but from myown limited experence tarp making. the SERIOUSLY short bottom edge does nothing to shave weight off the assembly. the reason being that the door size has to make up the difference for the less wieight of the tarp main body! the reason being that youre looking at two doors on each end...that's 4doors per tarp!!! even if you address only one end i think you'll find that youre adding weight, rather than shaveing it off.

I'm only making one set of removable doors, not two. I figure I will be able to move the doors to where they are needed or leave them in the pack or even at home when not needed.

*Heaven best have trees, because I plan to lounge for eternity.

Good judgement is the result of experience and experience the result of bad judgement. - Mark Twain